Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 71 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the weight of the bob (b) the string length (c) how far we pull it back (d) time for 10 swings
2. 2.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
3. 3.🕰️ A pendulum makes 5 swings in 5 seconds. How many seconds does one swing take?
4. 4.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a sharp tool (d) a small nut or washer
5. 5.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is what we measure. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
7. 7.🕰️ Which old clock uses a pendulum to keep time? (a) a grandfather clock (b) a sundial (c) a digital watch (d) a phone
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the weight of the bob (b) the string length (c) the same hook (d) time for 10 swings
9. 9.🛟 Why should you stand back from a swinging pendulum? (a) it is wet (b) it is magnetic (c) the bob could hit you (d) it is hot
10. 10.🧺 Do we need a mirror for the pendulum? (a) not needed (b) needed
11. 11.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
12. 12.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it stays the same (c) it becomes 4 times (d) it halves
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) a stopwatch (c) a heavy nut or washer (d) a mirror
14. 14.True or false: turmeric powder is needed for the pendulum. (a) False (b) True
15. 15.True or false: a ruler is not needed for the pendulum. (a) True (b) False
16. 16.🕰️ A pendulum takes 1 second for one swing. How many swings does it make in 9 seconds?
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) how far we pull it back (c) time for 10 swings
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🧺 Do we need a heavy nut or washer for the pendulum? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the pendulum? (a) a stopwatch (b) a string (c) a balloon (d) a ruler
21. 21.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) it cannot swing (c) about the same (d) much slower
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
23. 23.True or false: a heavy nut or washer is needed for the pendulum. (a) False (b) True
24. 24.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
25. 25.True or false: a mirror is needed for the pendulum. (a) True (b) False
26. 26.🧺 Which of these is not needed for the pendulum? (a) a mirror (b) a ruler (c) a stopwatch (d) a pencil and tape
27. 27.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the same hook (c) the string length
28. 28.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
29. 29.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
30. 30.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a stopwatch (c) a magnet (d) a ruler
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a stopwatch (c) a pencil and tape (d) a heavy nut or washer
33. 33.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a pencil and tape (c) a string (d) turmeric powder
34. 34.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the weight of the bob”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
36. 36.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
37. 37.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 30 seconds?
38. 38.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.True or false: a balloon is needed for the pendulum. (a) False (b) True
40. 40.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a ruler (c) a balloon (d) a battery cell

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